As with capital goods (tangible items such as buildings, machinery, and equipment produced and used in the production of other goods and services), the consumption of a durable good is spread over its life span, which tends to create demand for a series of maintenance services.
The event which is referred to as The Phoenix Lights comprised of a series of incidents, involving a number of different craft and orbs which took place during the evening of March 13th 1997.
With an unrivaled commitment to sustainability, the Tempe campus is the most solar-powered of any in the U.S., and offers easy access to all of metropolitan Phoenix through public transit including light rail.